Add bash completion for `swarm join --availability`
Add bash completion for `swarm join --availability`

Signed-off-by: Harald Albers <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@albersweb.de>

liaoqingwei/docker,dsheets/moby,naveed-jamil-tenpearls/moby,AkihiroSuda/docker,darrenstahlmsft/moby,tophj-ibm/moby,imkin/moby,Ramzec/docker,konstruktoid/docker-upstream,KingEmet/docker,ibuildthecloud/docker,coreos/docker,estesp/docker,mahak/docker,liaoqingwei/docker,ibuildthecloud/docker,nalind/docker,jlhawn/docker,ibuildthecloud/docker,dccurtis/docker,darrenstahlmsft/docker,djs55/docker,akira-baruah/docker,moul/docker,sdurrheimer/docker,imkin/moby,KarthikNayak/docker,thtanaka/docker,ndeloof/docker,pramodhkp/moby,ripcurld0/moby,ColinHebert/docker,mstanleyjones/docker,dsheets/moby,naveed-jamil-tenpearls/moby,bonczj/moby-json-file-logger,mikebrow/docker,gschaetz/moby,coreos/docker,amatsus/docker,tmp6154/docker,estesp/docker,jlhawn/docker,thaJeztah/docker,Mokolea/docker,vdemeester/docker,nawawi/docker,vdemeester/docker,mtesselH/docker,danyalKhaliq10p/moby,paralin/docker,ffoysal/docker,paralin/docker,johnstep/moby-moby,noironetworks/docker,rhatdan/docker,charleszheng44/moby,haveatry/docker,laijs/moby,kolyshkin/docker,jthelin/docker,cyphar/docker,resin-io/docker,KingEmet/docker,coolljt0725/docker,mike1729/docker,whuwxl/docker,cpuguy83/docker,xuxinkun/docker,rhatdan/docker,sterchelen/docker,moul/docker,moby/moby,kolyshkin/moby,dmcgowan/docker,raja-sami-10p/moby,Syntaxide/docker,darrenstahlmsft/docker,erikstmartin/docker,erikstmartin/docker,hqhq/moby,pramodhkp/moby,alfred-landrum/docker,sterchelen/docker,gschaetz/moby,dmcgowan/docker,KarthikNayak/docker,flavio/docker,darrenstahlmsft/docker,jimjag/docker,q384566678/docker,amatsus/docker,jvanz/docker,raja-sami-10p/moby,mixja/docker,catinthesky/docker,yummypeng/docker,mahak/docker,moypray/docker,gnailuy/docker,konstruktoid/docker-1,prertik/docker,rremer/moby,alfred-landrum/docker,kojiromike/docker,flavio/docker,jlhawn/docker,erikstmartin/docker,jwhonce/docker,madhanrm/docker,jwhonce/docker,michael-holzheu/docker,jwhonce/docker,prertik/docker,charleszheng44/moby,mike1729/docker,ripcurld0/moby,duglin/docker,jimjag/docker,maxamillion/docker,nalind/docker,q384566678/docker,darrenstahlmsft/moby,allencloud/docker,danyalKhaliq10p/moby,cyphar/docker,qudongfang/docker,scotttlin/docker,tklauser/docker,dgageot/docker,lixiaobing1/docker,hqhq/moby,justincormack/docker,KingEmet/docker,kencochrane/docker,kojiromike/docker,ibuildthecloud/docker,miminar/docker,lixiaobing10051267/docker,prertik/docker,shishir-a412ed/docker,unclejack/docker,jimjag/docker,crosbymichael/docker,bearstech/moby,JMesser81/docker,yosifkit/docker,thaJeztah/docker,haveatry/docker,madhanrm/docker,mikebrow/docker,gnailuy/docker,tophj-ibm/docker,cpuguy83/docker,docker/docker,rancher/docker,tophj-ibm/moby,mixja/docker,tonistiigi/docker,dperny/docker,fcrisciani/docker,fcrisciani/docker,sdurrheimer/docker,gnailuy/docker,POLJM242/docker,Ramzec/docker,scotttlin/docker,SvenDowideit/docker,alfred-landrum/docker,rremer/moby,x1022as/docker,Syntaxide/docker,hqhq/moby,coolljt0725/docker,rancher/docker,laijs/moby,jameszhan/docker,maxamillion/docker,thtanaka/docker,pradipd/moby,unclejack/docker,sarnautov/moby,qudongfang/docker,shhsu/docker,mike1729/docker,mtesselH/docker,shhsu/docker,SvenDowideit/docker,jthelin/docker,trebonian/docker,sarnautov/moby,moby/moby,kolyshkin/moby,vdemeester/docker,Ramzec/docker,lixiaobing1/docker,mixja/docker,djs55/docker,yosifkit/docker,PatrickLang/moby,nawawi/docker,shhsu/docker,konstruktoid/docker-upstream,michael-holzheu/docker,dsheets/moby,ndeloof/docker,akira-baruah/docker,docker/docker,YuPengZTE/docker,tonistiigi/docker,nalind/docker,duglin/docker,thaJeztah/docker,mkumatag/docker,scotttlin/docker,laijs/docker,dgageot/docker,Mokolea/docker,lixiaobing10051267/docker,catinthesky/docker,noironetworks/docker,lixiaobing10051267/docker,sarnautov/moby,srust/docker,xuxinkun/docker,jvanz/docker,dperny/docker,AkihiroSuda/docker,thaJeztah/docker,jimjag/docker,moby/moby,trebonian/docker,pramodhkp/moby,dgageot/docker,HideoYamauchi/docker,haveatry/docker,nawawi/docker,tklauser/docker,erikh/docker,Mokolea/docker,yasiramin10p/moby,yosifkit/docker,yongtang/docker,bearstech/moby,moypray/docker,POLJM242/docker,yosifkit/docker,qudongfang/docker,yummypeng/docker,crosbymichael/docker,ColinHebert/docker,HideoYamauchi/docker,kencochrane/docker,unclejack/docker,diogomonica/docker,tophj-ibm/docker,AkihiroSuda/docker,liaoqingwei/docker,moul/docker,docker/docker,dccurtis/docker,mkumatag/docker,bonczj/moby-json-file-logger,srust/docker,pradipd/moby,yongtang/docker,mahak/docker,allencloud/docker,dims/docker,gnailuy/docker,madhanrm/docker,naveed-jamil-tenpearls/moby,coolljt0725/docker,nawawi/docker,trebonian/docker,ColinHebert/docker,x1022as/docker,johnstep/moby-moby,kojiromike/docker,shishir-a412ed/docker,kencochrane/docker,tianon/docker,tophj-ibm/docker,justincormack/docker,erikh/docker,cpuguy83/docker,crosbymichael/docker,kolyshkin/docker,sdurrheimer/docker,fcrisciani/docker,mtesselH/docker,allencloud/docker,flavio/docker,jvanz/docker,x1022as/docker,YuPengZTE/docker,gjaskiewicz/moby,shishir-a412ed/docker,HideoYamauchi/do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